A two-point modulator using a
voltage control oscillator includes: a modulation section including a feedback circuit for performing
feedback control of a
signal outputted from the
voltage control oscillator based on an inputted modulated
signal, and a feedforward circuit for calibrating the modulated
signal and outputting the calibrated modulated signal to the
voltage control oscillator; a signal output section for, upon calibration
processing, outputting a predetermined reference signal in place of the modulated signal, to the modulation section; and a
gain correction section for, in a state where the feedback circuit is in an open loop state, calculating a frequency transition amount of the reference signal outputted from the
voltage control oscillator, and correcting a
gain used for calibration of the modulated signal performed by the feedforward circuit, based on the calculated frequency transition amount.